added context manager condition to attr function

src/inject/__init__.py

@@ -73,6 +73,7 @@ def my_config(binder):
     inject.configure(my_config)
 
 """
+import asyncio
 import contextlib
 
 from inject._version import __version__
@@ -281,7 +282,14 @@ def __init__(self, cls: Binding) -> None:
         self._cls = cls
 
     def __get__(self, obj: Any, owner: Any) -> Injectable:
-        return instance(self._cls)
+        inst = instance(self._cls)
+        if isinstance(inst, contextlib._AsyncGeneratorContextManager):
+            raise InjectorException(
+                    'Fail to load _AsyncGeneratorContextManager, Use autoparams, param or params instead of attr funcion')
+        elif isinstance(inst, contextlib._GeneratorContextManager):
+            with contextlib.ExitStack() as sync_stack:
+                inst = sync_stack.enter_context(inst)
+        return inst
 
 
 class _AttributeInjectionDataclass(Generic[T]):